Division-wall for water-tube boilers.



APPLICATION FILED SEPT. 10, 1912.

Patented July 28, 1914.

IN VE N ToRs.

' A T'I'ORNEY UNITED STATES PATENT oFFion.

WILLIAM E. SELLERS AND HENRY B. BRADFORD, OF EDGEMOOR, DELAWARE, ASSIGN- ORS TO EDGE M003. IRON COMPANY, OF EDGEMOOR, DELAWARE, A CORPORATION OF DELAWARE.

Specification of'Letters Patent.

DIVISION-WALL FOR WATER-TUBE BOILERS.

Patented July 28, 1914.

Application filed September 10, 1912. Serial No. 719,512.

To all whom it may concern:

Be it known that we, WILLIAM F; SELLERS and HENRY B. BRADFORD, citizens of the United States, residing in Edgemoor, Brandywine Hundred, county of Newcastle, and State of Delaware, have invented a certain new and useful Improvement in Division-Walls for WaterTube Boilers, of which the following is a true and exact description, reference being had to the accompanya The object of the invention is to provide a simple and durable division wall construction which may be installed with comparative ease and at a relatively low cost.

The various features of novelty which characterize our invention are pointed out with articularity in the claims annexed to and orming a part of this specification. For .a better understanding of the invention, however, and of the advantages possessed by it, reference should 'be had to the accompanying drawings and descriptive matter which I have illustrated, and described in detailed forms in which the invention may be embodied.

Of the drawings: Figure 1 is a longitudinal sectional elevation of a water tube boile of familiar type, equipped with division walls embodying a preferred form of our invention. Fig. 2 is a partial sectional "elevation taken on the line 2-2 of Fig. 1, but on a larger scale, with parts of the division wall broken away and removed to facilitate an nnderstanding' of the division wall con struction' F' 3 is a sectional elevation takenon the me 3-3 of Fig. 2, but one still larger scale.

In the drawings, A and B represent the front and rear headers of a water tube boilers, These headers areconnected by a bank of water tubes C which are ,sli htly inclined to the horizontal. A:bove ank 1 types of water tube, boilers.

of water tubes 0 are located the steam and water drum or drums D which connect the upper ends of the headers.

E, E, represent the end walls of the boiler housing, and F, F, represent the side walls of the boiler housin G represents the Tmidge wall located beneath the water tubes at the rear end of the furnace chamber, and H and I represent thebaflle or division walls employed to cause the gaseous products of combustion, issuing from the furnace chamber, to pass upward through the intertube space adjacent the front header A, then downward through an intermediate portion of the intertube space, and upward through the portion of the intertube spaceaadjacent the rear header. In

so far as above described the boiler construction is of a type which is WGll kIIOW-II and in general use. 7 I

The division wall H, which rises from the bridge wall G, comprises, in the preferred construction illustrated, a skeleton frame work which is incorporated in and reinforces a body of suitable refractory material which may advantageously be that commercially known as hot blast cement and which includes an asbestos fiber binder. This cement is highly refractory, and durable, and with the asbestos fiber binder incorporated in it, possesses considerable mechanical strength;

As shown best in Figs. 2 and 3, the skeleton frame work of the division wall H comprises a parallel, series of wrought metala-ngle chars J, which are parallel to .each other, and are inclined to the horizontal to correspond to the arrangement of water tubes C which are so disposed that appreciable spaces exist between inclined rows of the water tubes, whereas no such spaces exist between horizontal and vertical rows of the tubes. tubes is one commonly employedwin certain The skeleton frame work also comprises a second set of wrought vmetal bars J A, whichare parallel ,to each other, .end lie between the rows of tube 0 which extend transversely to, though-as shown, not exactly perpendicular to the'rows This arrangement of the water stalled and are highly durable.

of tubes between which the bars J are 10- catcd. The angle bars J and JA are ar ranged so that their flanges J extend transversely to the tubes C and abut against each other, while the flan es J 2 of the bars J and J A, extend toward t e front and rear headers respectively of the boiler. The bars J and JA are connected together at appropriate points as by rivets or bolts J. The

ends of the bars J and J A adjacent the side walls, F, F, of the housing are secured to vertical bars J To more efiectually protect the lower ends of the wrought metal bars J and J A from the high tem eratures prevailing in the lower portions 0 the first pass for the hot gaseous products, cast metal sections K are employed. One of these sec-. tions is inserted between each pair of inclined rows of tubes C between which is also located a corresponding angle bar' JA. Each section K. is notched at its opposite edges to receive the corresponding water tubes and may be inserted after the tubes 0 are ut in place by first passing it between the tubes with the plane of the section parallel to the length of the tubes, and then giving it a quarter turn about its longitudinal axis. Each adjacent pair of sections K meet in the spaces between the tubes of the row engaged in part by each section. The cast iron sections may be connected together at various points by means of bolts or pins K. .The division wall I may be substantially identical in construction with the division wall H, except that, the cast metal sections K, are unnecessary and are omitted the case of the wall I. As shown in the drawings metallic soot cleaning pipes N and nozzles O and O are also incorporated in the divisions H and I. This arrangementof the soot cleaning apparatus forms no part of our joint invention, but is the sole invention of one of us, namely, Henry B. Bradford, and is disclosed and claimed in his application for patent Serial No. 719,515 filed concurrently herewith. It is to be understood, of course, that our division wall construction does not necessarily involve the presence or use of tube cleaning apparatus but it is one of the advantages of our invention that our division wall construction permits cleaning pipes and nozzles to be readily incorporated in it as shown herein and in more detail in said application Serial No. 719,515.

The division walls H and I may be read ily and comparatively inexpensively. in- In installing the division walls, the iron parts to be incorporated in the cement body portion are first put in place and then the cement material is applied in-a plastic condition. The

plastic material thus plastered in place on the bars J and JA is supported by these.

tain features of our invention may be used to advantage without a corresponding use of other features.

Having now described our invention what we claim as new and desire to secure by Letters Patent, is:

1. Ina water tube boiler the combination witha bank of water tubes, of a transverse division wall which divides the intertube space into separate passes for the hot gases,

and comprising a skeleton framework formed of metallic bars passing through the spaces between the tubes transversely to the latter, some of said bars extending transversely to others, and a body portion of refractory material plastered on said bars and supported by and securing together said bars and saidtubes.

2. In a water tube boiler, the combination with aflbank of substantially parallel water tubes arranged in transverse rows, of a division wall dividing the intertube space into separate passes for the hot gases, and com-- prising a body portion of refractory material and a reinforcing skeleton framework incorporated therein, and comprising two transverse groups of metal bars arranged between the transverse rows of tubes, and means for securing the bars of one group to bars of the other group, said means being adapted to secure the bars thereby connected after the said bars have been separately inserted in place between the said water tubes.

3. In a water tube boiler, the combination with a bank of substantially parallel water tubes arranged in transverse rows, of a division wall dividing the intertube space into separate passes for the hot gases and comprising a body portion of refractory material and a skeleton framework incorporated therein and comprising two transverse rows of wrought metal bars arranged between the transverse rows of tubes, and cast metal sections, also incorporated in said body portion adjacent one edge of the wall and at one side ofsaid wrought metal bars.

4:. In a water tube boiler, the combination with a bank of substantially parallel water tubes arranged in transverse rows of a division wall dividing the intertube space into separate passesfor the hot gases, and comprising a body portion of refractory material and a reinforcing skeleton framework one another abutting against each other and incorporated therein, and comprising two being secured together.

transverse groups of flanged metal bars ar- WILLIAM F. SELLERS. ranged between the transverse rows of tubes HENRY B. BRADFORD. and each having a flange transverse to, and Witnesses:

flange arallel to the length of the water CLARENCE M. DIOKEY,

tubes, the transverse flanges of bars crossing J. H. BROWN. 

